Fairchild AC/DC to Logic Interface Optocoupler HCPL-3700 Product Manual

HCPL-3700
AC/DC to Logic Interface Optocoupler
Features
■
AC or DC input
■
Programmable sense voltage
■
Logic level compatibility
■
Threshold guaranteed over temperature (0°C to 70°C)
■
Optoplanar™ construction for high common mode
immunity
■
UL recognized (file # E90700)
■
VDE certified – ordering option 'V', e.g., HCPL3700V
Applications
■
Low voltage detection
■
5 V to 240 V AC/DC voltage sensing
■
Relay contact monitor
■
Current sensing
■
Microprocessor Interface
■
Industrial controls
Schematic
AC 1
DC+ 2
DC- 3
AC 4
TRUTH TABLE
(Positive Logic)
Input
H
L
A 0.1 µF bypass capacitor must
be connected between pins 8
and 5.
©2005 Fairchild Semiconductor Corporation
HCPL-3700 Rev. 1.0.1
8 V
CC
7 NC
6 V
O
5 GND
Output
L
H
Description
The HCPL-3700 voltage/current threshold detection
optocoupler consists of an AlGaAs LED connected to a
threshold sensing input buffer IC which are optically cou-
pled to a high gain darlington output. The input buffer
chip is capable of controlling threshold levels over a wide
range of input voltages with a single resistor. The output
is TTL and CMOS compatible.
Package
8
8
1
R
X
AC/DC
HCPL-3700
POWER
GND 1
April 2007
1
8
1
LOGIC
GND 2
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